粳稻一次枝梗数和二次枝梗数的遗传分析  

Genetic analysis on number of primary and secondary branches per panicle in japonica rice(Oryza sativa L.)

作　　者：郭媛[1] 万志兵[1] 陈献功[1] 洪德林[1] 

机构地区：[1]南京农业大学作物遗传与种质创新国家重点实验室,江苏南京210095

出　　处：《南京农业大学学报》2008年第3期8-12,共5页Journal of Nanjing Agricultural University

基　　金：长江学者和创新团队发展计划(IRT0432)

摘　　要：2005年和2006年调查了粳稻品种丙8979与C堡及其杂交后代通过一粒传衍生的重组自交系群体(F7∶8和F8∶9)370个株系主茎穗一次和二次枝梗数的表型分布,并运用主基因+多基因混合遗传模型对这2个性状进行了遗传分析。结果2年的数据均显示,一次枝梗数性状受2对连锁主基因控制,同时存在多基因,主基因遗传率分别为66%和40%,多基因遗传率分别为11%和41%;二次枝梗数性状均受2对独立主基因控制,同时存在多基因,主基因遗传率分别为80%和65%,多基因遗传率分别为10%和12%。Phenotypic distributions of primary branch number （PBN） and secondary branch number （SBN） per panicle were investigated in Bing 8979, C Bao and their recombinant inbred lines （370） in 2005 （ F7：8 ） and 2006 （ F8： 9 ）. Genetic analysis for the two traits were conducted by using mixed major-gene plus polygenes inheritance model. The results indicated that PBN per panicle was controlled by two linkage major genes plus polygenes. Major gene heritability was 66% in 2005 and 40% in 2006, polygene heritability was 11% in 2005 and 41% in 2006. SBN per panicle was controlled by two major genes plus polygenes. Major gene heritability was 80% in 2005 and 65% in 2006, while polygene heritability was 10% in 2005 and 12% in 2006.

关 键 词：粳稻 一次枝梗数 二次枝梗数 主基因+多基因混合遗传模型 遗传分析 

分 类 号：S511.032[农业科学—作物学]